WeChat is one of the first tech services from China to tap an international customer base and to sport more users outside the home country than domestically.
This year Ogilvy became the first ad agency to launch a China Practice in New York to serve the growing need for communications services by China-based companies as they move into international markets.
Tenants include the magazine publisher Conde Nast, the government's General Services Administration and Vantone Holdings China Center, which will provide business space for international companies.